Pope Francis holds a wooden pastoral staff carved by Italian prison inmates as he leaves at the end of the Palm Sunday mass in St. Peter's Square. Tens of thousands of Romans, tourists and pilgrims joined Pope Francis in the solemn Palm Sunday service. Riccardo De Luca, AP

Pope Francis is hugged by a child, who was hoisted up to greet him, at the end of a Palm Sunday service in St. Peter's Square at the Vatican. The pope decided against his prepared homily and spoke entirely off-the-cuff. Later, he hopped off his Popemobile to pose for "selfies" with young people in the crowd. Gregorio Borgia, AP